Hydraulic actuated recessing tool



Jan. 21, 1969 R. s. NAHODIL ETA!- 3,422,705

HYDRAULIC ACTUATED RECESSING TOOL Filed April 14, 1956 Sheet g Of 2 45 "Q yn i?) 44 INVENTOR. ROBERT S. NAHODIL HAROLD E. CORRELL ATfORNEY 3,422,705 HYDRAULIC ACTUATED RECESSING TOOL Robert S. Nahodil, Cuyahoga Falls, and Harold E. Correll, Greensburg, Ohio, assignors to The Goodyear Tire & Rubber Company, Akron, Ohio, a corporation of Ohio Filed Apr. 14, 1966, Ser. No. 542,489 US. Cl. 77-58 Int. Cl. B23b 47/22 9 Claims ABSTRACT OF THE DISCLOSURE This invention relates to a hydraulic-actuated recessing tool, and, more particularly, to a tool for cutting O-ring grooves, and the like, inside a cylinder.

It is the general object of the invention to provide a tool of the type described, and characterized by inexpensiveness of construction, ease and speed of operation, lack of maintenance, facility of cutting adjustment, and operation upon various cylinder sizes.

FIGURE 1 is a longitudinal cross section of a preferred embodiment of the apparatus of the invention;

FIGURE 2 is a bottom plan view of the apparatus of the invention illustrated in FIGURE 1 but with the cutting tool removed;

FIGURE 3 is a cross sectional view of the apparatus of the invention illustrated in FIGURE 1 as seen from line 33 of FIGURE 1; and

FIGURE 4 is a cross sectional view of the apparatus of the invention illustrated in FIGURE 1 as seen from line 44 of FIGURE 1.

In the drawings, with particular reference to FIGURE 1, the numeral 1 generally indicates the housing of a rotary mounted turret of the type present in a conventional boring mill, or turret drill. It should be understood, however, that the apparatus of the invention is not limited for use therewith, but is easily adapted for use on a conventional drill press or the like. The turret 1 rotatably carries a socket 2 which is adapted to be rotatably driven about its axis by suitable drive means indicated diagrammatically at 3. The rotating socket 2 is adaptel to receive therein a shank or body 4 which is removably stabbed in the socket 2 and secured thereto for rotation therewith by a plurality of set screws 5. The shank 4 has an integral, axially-directed, hollow cylinder 6 which slidably receives in fluid-tight relationship a piston or motor 7. Fluid port means 8 and port means 9 are positioned in the cylinder walls at opposite sides of the piston and connect to circumferential grooves 10 and 11 on the outer surface of the cylinder, respectively, so that external fluid pressure means (not shown) can effect a downward or upward movement of the piston 7 in the direction of the arrows 12 in FIGURE 1 when said fluid pressure means are actuated.

To supply the fluid pressure to the rotating cylinder 6, a stationary sleeve 13 is provided which rotatably surrounds the cylinder, as best illustrated by FIGURE 1.

atent O The sleeve 13 has radial ports 14 and 15 which connect to the circumferential grooves 10 and 11, and a plurality of O-rings 16 are carried by the sleeve 13, said O-rings sealing the cylinder within the stationary sleeve 13 at both sides of the grooves 10 and 11. One or more support rods 17 are secured to and extend from said stationary turret 2, with the downward extending end of the rod being received by a 'fork 18 secured to the sleeve 13. The fork 18 engages with the end of the rod 17 so that the fork 18 prevents the sleeve 13 from rotating with the cylinder 6, but wherein the fork 18 is not prevented from sliding downwardly off the end of the rod 11. This arrangement permits the entire shank 4, cylinder 6, and sleeve 13 to be dropped out of and away from the rotating socket 2 by simply loosening the set screws 5 which secure the shank 4 to the socket 2 as it is stabbed therein.

A cap 19 is threadably secured to the lower end of the cylinder 6 at 20 and is locked in place by suitable set screws 21, the cap having a circumferential flange 22 rotatably engaging with the bottom of the stationary sleeve 13 to prevent it from moving downwardly. The cap 19 also receives for sliding movement a piston rod 23 secured to the piston 7. The lower end of the piston rod 23 carries a clevis 32 which is secured thereto by means of a threaded pin 31.

A body 24 is secured to the cap 19 by a plurality of cap screws 25 in the manner best illustrated by FIG- URE 1. The body 24, of inverted channel-shape in cross section, has a base 30 and a pair of integral downwardly extending side plates 26 and 27. The side plates 26 and 27 each have a window 28 cut therein and also the base 30 has a substantially circular opening 29, as best illustrated by FIGURE 3. This opening 29 is adapted to receive the lower end of the piston rod 23 and the clevis 32 carried thereby.

Slidably received by the body 24, and being best illustrated by FIGURE 3 and 4, is a support or slide 34 which is pivotally connected to the clevis 32 so that as the piston rod 23 moves downwardly, the slide 34 moves in a direction perpendicular to the direction of stroke of said piston and to the axis of rotation of the shank 4. The connection of the slide 34 is achieved by linkage or link 35 which pivotally connects the slide 34 to the clevis 32. One end of the link 35 is received by the clevis and is pivotally connected thereto by a pin 33. The other end of the link 35 is pivotally connected to a pin 36 which extends between two integral ears 37 and 38 of the slide 34 in the manner best illustrated by FIGURES 3 and 4.

Ways or gibs 39 are secured to the lower edges of the side plates 26 and 27 of the body 24 by suitable cap screws 40, and said gibs 39 are adapted to slidably engage the bottom lateral edges of the slide 34 to guide it in its sliding movement. As seen in FIGURE 4, the top lateral edges of the slide engage the lower inside edges of the side plates 26 and 27. In order to prevent lateral movement of the clevis as the piston rod moves downwardly, a pair of thrust rollers 41 and 42, rotatably mounted on a dowel 43 supported by the side plates 26 and 27, engage with the side of the clevis. Thus, when the fluid pressure means actuate the piston 7 forcing it downwardly in the cylinder 6, the slide 34 moves in a direction perpendicular to the direction of stroke of the piston.

In order to limit the forward and backward sliding movement of the slide 34, a pair of end plates 44 and 45 are secured to the body by suitable cap screws 46 and a pair of stops 47 are adjustably mounted on the end plates. The stops 47 are threadably received by the end plates 44 and 45 and thus can be adjustably turned to limit the movement of the slide 34.

A tool block or cutting bit 48 is adjustably secured to the slide 34 by cap screws 50 as best illustrated by FIGURES l and 2. The tool block 48 has a plurality of slots 51 through which the cap screws 50 extend. This allows the tool block 48 to be selectively positioned on the slide. For controlled adjustment of the tool block 48 on the slide 34, adjusting screw means 52 extend between the block and an ear 53 on the slide. Thus, cap screws 50 can be loosened, the block 48 adjusted by the screw means 52, and the cap screws 50 retightened.

A tool 49 is carried in the tool block 48 being releasably secured thereto by a set screw 54. The described structure permits a very fine cutting adjustment of the tool 49, and operations upon work pieces of various internal diameters.

FIGURE 1 illustrates the apparatus of the invention positioned to cut an O-ring groove 55 (shown in dotted lines) on the inside wall of a cylinder 56, the lower portion of the cylinder being broken away.

It also should be understood that the mechanical interaction between the piston 7 .and the tool block 48 can still be achieved if the socket 2 is stationary, with rotation being imparted to the work piece.

While a certain representative embodiment and details have been shown for the purpose of illustrating the invention, it will be apparent to those skilled in this art that various changes and modifications may be made therein without departing from the spirit or scope of the invention.

What is claimed is:

1. A cutting tool for recessing, boring and the like comprising a body, a cutting bit, means mounting said bit on said body for movement in opposite directions, and a motor carried by said body and having an output member movable in opposite directions, said motor being selectively operable to effect movement of said output member in each of said opposite directions, said output member and bit being operatively connected for selective movement of said bit in each of said opposite directions of movement thereof, said motor being fluid pressure responsive and disposed within said body, means on said body for supplying pressurized fluid to said motor from an external source including .a normally fixed fluid distribution member rotatably mounted on said body whereby said body may be rotated relative to said distribution member, said distribution member having at least one fluid passage communicating at one end with said motor, and means for connecting the other end of said passage to an external fluid source.

2. A tool as described in claim 1 in which said means mounting said bit includes a support mounted on said body for movement inwardly and outwardly of said body in a direction different from the direction of movement of the output member of said motor, and a linkage drivingly connecting said output member and said support.

3. A tool as described in claim 1 in which said motor comprises means forming a cylinder internally of said body and a piston disposed within said body and having a piston rod forming said output member and extending externally of said cylinder, said means mounting said bit including a support carried by said body for movement inwardly and outwardly thereof, means drivingly connecting said piston rod and support, means for selectively adjusting said bit relative to said support and inwardly and outwardly of said body, and adjustable means for limiting movement of said bit by said motor in a direction outwardly of said body.

4. A cutting tool for recessing, boring and the like comprising a body having a cylinder in which is received a piston, a support slidably carried by said body for movement in a direction extending inwardly and outwardly of said body and at an angle to the direction of movement of said piston, a linkage drivingly connecting said piston and support for reciprocation of the support in response to reciprocation of the piston, means for conducting pressurized fluid to and from said cylinder from a source externally of said body, a cutting bit supported by said support for movement therewith, said piston having a piston rod extending generally longitudinally of said body, said support being mounted for movement generally laterally of said body, a link pivotally connected at one end to said piston rod and at the other end to said support, and thrust roller means carried by said body and acting on said piston rod to take the thrust of said link extend-ing generally in the direction of movement of said support inwardly of said body.

5. A cutting tool as described in claim 4 in which means are provided for the selective adjustment of said bit relative to said support generally in the direction of movement of said support.

6. In a recessing tool the combination of z a socket,

a shank removably stabbed in said socket and secured thereto, said shank having a downwardly extending axially directed hollow cylinder,

a piston slidably received by the cylinder,

fluid pressure means acting to move said piston axially in the cylinder,

a body secured to the lower end of the cylinder,

tool block means slidably received by said body for sliding movement therein at right angles to the axis of the shank, and

link means pivotally connecting said piston to the tool block means whereby a stroke of said piston effects .a sliding movement of the tool block means in the body in a direction substantially perpendicular .to the direction of stroke of said piston and the longitudinal axis of said shank, said link means acting with a toggle action, and additional roller means on the block for takng the radial thrust of the link means.

7. A recessing tool according to claim 6 wherein the tool block means includes a substantially radially directed tool, a holder carrying the tool, a block slidable radially in the body, and means mounting the holder on the block in radially adjustable position thereon.

8. A recessing tool according to claim 6 and including:

a fixed frame, said socket being rotatably journalled in said frame,

drive means rotating said socket and said shank removably stabbed therein, said piston received by the cylinder in said shank rotating with the cylinder.

9. A recessing tool according to claim 8 wherein cap means carried 'by the body rotatably engage the bottom of the sleeve to hold the sleeve against axially downward movement.

References Cited UNITED STATES PATENTS 2,383,050 8/1945 Esson 77-58.3 3,113,475 12/1963 Lombardo 7758.35

FOREIGN PATENTS 147,418 10/1962 U.S.S.R.

GERALD A. DOST, Primary Examiner. 

